Doctors cannot effect a cure if the disease has spread too far.

假如这种疾病已扩散得厉害，医生也无法妙手回春。

《牛津词典》

It is very important to consider the possibility of the ovarian metastasis in patients with colonic cancer, and prophylactic oophorectomy is imperative in order to effect a cure.

在大肠癌的诊断与治疗中，充分地估计卵巢转移的可能性，恰当地施行预防性卵巢切除术是十分重要的。

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Repeat the process a few times for better results, but to cure the possible drying effect of using too much deep-cleanse, apply a nourishing conditioner to the ends of your hair.

为了达到更好的效果，可以重复几次这一过程，但是为了防治使用过多深度清洁洗发水导致的头发干燥，可以将滋养的护发素涂在你头发的发尾处。

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If an upset microbiome causes illness, settling it down might effect a cure.

ECONOMIST: Modern medicine

The "cure" took effect within only a few months of taking the drug.

BBC: Fish food poisoning breakthrough

In considering the effectiveness of any medicine, conventional or herbal, it's important to remember that the placebo effect, or the patient's desire to believe in a cure, can have a powerful influence.

CNN: ASIANOW - TIME Asia